New Research Finds No Evidence That Thimerosal-Containing Vaccines Affect Neurodevelopment and Behavior in Infant Primates(Austin, Texas) – February 18, 2015 - A research study published today in Environmental Health Perspectives reported that vaccination of infant macaques with thimerosal-containing vaccines did not negatively impact neurodevelopment, cognition, or behavior. In this study animals received several pediatric vaccines containing thimerosal (a mercury-based preservative) in a schedule similar to that given to infants in the 1990s. Other animals received just the measles-mumps-rubella (MMR) vaccine, which does not contain thimerosal, or an expanded vaccine schedule similar to that recommended for US infants today. Control animals received a saline injection. Regardless of vaccination status, all animals developed normally.